/*
 * Copyright (C) 2008 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.cepri.service.zxing;

import android.app.Activity;
import android.app.AlertDialog;
import android.graphics.Bitmap;
import android.hardware.Camera;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.annotation.RequiresApi;
import android.text.TextUtils;
import android.util.Log;
import android.view.KeyEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import com.cepri.service.yingxiao.ZxingManager;
import com.cepri.service.zxing.camera.CameraManager;
import com.cepri.service.zxing.camera.open.OpenCamera;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.DecodeHintType;
import com.google.zxing.Result;
import com.google.zxing.ResultMetadataType;
import com.google.zxing.client.result.ResultParser;
import com.sgcc.pda.baselibrary.utils.ToastUtils;
import com.sgcc.pda.mdrh.task.safelibrary.R;

import java.io.IOException;
import java.util.Collection;
import java.util.EnumSet;
import java.util.Map;

/**
 * This activity opens the camera and does the actual scanning on a background thread. It draws a
 * viewfinder to help the user place the barcode correctly, shows feedback as the image processing
 * is happening, and then overlays the results when a scan is successful.
 *
 * @author dswitkin@google.com (Daniel Switkin)
 * @author Sean Owen
 */
public class CaptureActivity extends Activity implements SurfaceHolder.Callback, View.OnClickListener {

    private static final String TAG = CaptureActivity.class.getSimpleName();

    private static final long DEFAULT_INTENT_RESULT_DURATION_MS = 1500L;
    private static final long BULK_MODE_SCAN_DELAY_MS = 1000L;
    public static String KEY_DATA = "key_data";

    private static final Collection<ResultMetadataType> DISPLAYABLE_METADATA_TYPES =
            EnumSet.of(ResultMetadataType.ISSUE_NUMBER,
                    ResultMetadataType.SUGGESTED_PRICE,
                    ResultMetadataType.ERROR_CORRECTION_LEVEL,
                    ResultMetadataType.POSSIBLE_COUNTRY);

    private CameraManager cameraManager;
    private CaptureActivityHandler handler;
    private Result savedResultToShow;
    private ViewfinderView viewfinderView;
    private TextView statusView;
    //  private View resultView;
    private Result lastResult;
    private boolean hasSurface;
    private IntentSource source;
    private Collection<BarcodeFormat> decodeFormats;
    private Map<DecodeHintType, ?> decodeHints;
    private String characterSet;
    //  private HistoryManager historyManager;
    private InactivityTimer inactivityTimer;
    private BeepManager beepManager;
    private AmbientLightManager ambientLightManager;
    private Button btnSdt, btnBm;
    private boolean isOpen = false;

    ViewfinderView getViewfinderView() {
        return viewfinderView;
    }

    public Handler getHandler() {
        return handler;
    }

    CameraManager getCameraManager() {
        return cameraManager;
    }

    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);

        Window window = getWindow();
        window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
        setContentView(R.layout.capture);

        btnSdt = findViewById(R.id.btn_sdt);
        btnBm = findViewById(R.id.btn_bm);
        btnSdt.setOnClickListener(this);
        btnBm.setOnClickListener(this);
        hasSurface = false;
        inactivityTimer = new InactivityTimer(this);
        beepManager = new BeepManager(this);
        ambientLightManager = new AmbientLightManager(this);

        //    PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
    }


    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
    @Override
    protected void onResume() {
        super.onResume();
        cameraManager = new CameraManager(getApplication());
        viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);
        viewfinderView.setCameraManager(cameraManager);

        //    resultView = findViewById(R.id.result_view);
        statusView = (TextView) findViewById(R.id.status_view);

        handler = null;
        lastResult = null;

        resetStatusView();


        beepManager.updatePrefs();
        ambientLightManager.start(cameraManager);

        inactivityTimer.onResume();

        source = IntentSource.NONE;
        decodeFormats = null;
        characterSet = null;

        SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
        SurfaceHolder surfaceHolder = surfaceView.getHolder();
        if (hasSurface) {
            // The activity was paused but not stopped, so the surface still exists. Therefore
            // surfaceCreated() won't be called, so init the camera here.
            initCamera(surfaceHolder);
        } else {
            // Install the callback and wait for surfaceCreated() to init the camera.
            surfaceHolder.addCallback(this);
        }
    }

    @Override
    protected void onPause() {
        if (handler != null) {
            handler.quitSynchronously();
            handler = null;
        }
        inactivityTimer.onPause();
        ambientLightManager.stop();
        beepManager.close();
        cameraManager.closeDriver();
        //historyManager = null; // Keep for onActivityResult
        if (!hasSurface) {
            SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
            SurfaceHolder surfaceHolder = surfaceView.getHolder();
            surfaceHolder.removeCallback(this);
        }
        super.onPause();
    }

    @Override
    protected void onDestroy() {
        inactivityTimer.shutdown();
        super.onDestroy();
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        switch (keyCode) {
            case KeyEvent.KEYCODE_BACK:
                if (source == IntentSource.NATIVE_APP_INTENT) {
                    setResult(RESULT_CANCELED);
                    finish();
                    return true;
                }
                if ((source == IntentSource.NONE || source == IntentSource.ZXING_LINK) && lastResult != null) {
                    restartPreviewAfterDelay(0L);
                    return true;
                }
                break;
            case KeyEvent.KEYCODE_FOCUS:
            case KeyEvent.KEYCODE_CAMERA:
                // Handle these events so they don't launch the Camera app
                return true;
            // Use volume up/down to turn on light
            case KeyEvent.KEYCODE_VOLUME_DOWN:
                cameraManager.setTorch(false);
                return true;
            case KeyEvent.KEYCODE_VOLUME_UP:
                cameraManager.setTorch(true);
                return true;
        }
        return super.onKeyDown(keyCode, event);
    }

    private void decodeOrStoreSavedBitmap(Bitmap bitmap, Result result) {
        // Bitmap isn't used yet -- will be used soon
//        if (handler == null) {
//            savedResultToShow = result;
//        } else {
//            if (result != null) {
//                savedResultToShow = result;
//            }
//            if (savedResultToShow != null) {
//                Message message = Message.obtain(handler, R.id.decode_succeeded, savedResultToShow);
//                handler.sendMessage(message);
//            }
//            savedResultToShow = null;
//        }

        if (savedResultToShow != null) {
            Message message = Message.obtain(handler, R.id.decode_succeeded, savedResultToShow);
            handler.sendMessage(message);
        }
        savedResultToShow = null;
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        if (holder == null) {
            Log.e(TAG, "*** WARNING *** surfaceCreated() gave us a null surface!");
        }
        if (!hasSurface) {
            hasSurface = true;
            initCamera(holder);
        }
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        hasSurface = false;
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        // do nothing
        hasSurface = false;
    }

    /**
     * A valid barcode has been found, so give an indication of success and show the results.
     *
     * @param rawResult   The contents of the barcode.
     * @param scaleFactor amount by which thumbnail was scaled
     * @param barcode     A greyscale bitmap of the camera data which was decoded.
     */
    public void handleDecode(Result rawResult, Bitmap barcode, float scaleFactor) {
        inactivityTimer.onActivity();
        lastResult = rawResult;
        //    ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(this, rawResult);

//        boolean fromLiveScan = barcode != null;
//        if (fromLiveScan)
//        {
        //      historyManager.addHistoryItem(rawResult, resultHandler);
        // Then not from history, so beep/vibrate and we have an image to draw on
        beepManager.playBeepSoundAndVibrate();
        viewfinderView.drawResultBitmap(barcode);
//            drawResultPoints(barcode, scaleFactor, rawResult);
//        }
        handleDecodeInternally(rawResult, barcode);

    }

    // Put up our own UI for how to handle the decoded contents.
    private void handleDecodeInternally(Result rawResult, Bitmap barcode) {

        String result = ResultParser.parseResult(rawResult).getDisplayResult().toString().trim();
        handleResult(result);

    }

    private void handleResult(String result) {
//        Intent intent = new Intent();
//        intent.putExtra(KEY_DATA, result);
//        setResult(Activity.RESULT_OK, intent);
        ZxingManager.OnScanClickListener callBack = ZxingManager.getInstance().getCallBack();
        if (callBack != null) {
            callBack.onResult(result);
        }
        finish();
    }


    private void initCamera(SurfaceHolder surfaceHolder) {
        if (surfaceHolder == null) {
            throw new IllegalStateException("No SurfaceHolder provided");
        }
        if (cameraManager.isOpen()) {
            Log.w(TAG, "initCamera() while already open -- late SurfaceView callback?");
            return;
        }
        try {
            cameraManager.openDriver(surfaceHolder);
            // Creating the handler starts the preview, which can also throw a RuntimeException.
            if (handler == null) {
                handler = new CaptureActivityHandler(this, decodeFormats, decodeHints, characterSet, cameraManager);
            }
            decodeOrStoreSavedBitmap(null, null);
        } catch (IOException ioe) {
            Log.w(TAG, ioe);
            displayFrameworkBugMessageAndExit();
        }
    }

    private void displayFrameworkBugMessageAndExit() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        //    builder.setTitle(getString(R.string.app_name));
        builder.setMessage(getString(R.string.msg_camera_framework_bug));
        builder.setPositiveButton(R.string.button_ok, new FinishListener(this));
        builder.setOnCancelListener(new FinishListener(this));
        builder.show();
    }

    public void restartPreviewAfterDelay(long delayMS) {
        if (handler != null) {
            handler.sendEmptyMessageDelayed(R.id.restart_preview, delayMS);
        }
        resetStatusView();
    }

    private void resetStatusView() {
        //    resultView.setVisibility(View.GONE);
        statusView.setText(R.string.msg_default_status);
        statusView.setVisibility(View.VISIBLE);
        viewfinderView.setVisibility(View.VISIBLE);
        lastResult = null;
    }

    public void drawViewfinder() {
        viewfinderView.drawViewfinder();
    }

    @Override
    public void onClick(View v) {
        if (R.id.btn_sdt == v.getId()) {
            if (!isOpen) {
                openLight();
            } else {
                closeLight();
            }
        } else if (R.id.btn_bm == v.getId()) {
            showEditDialog();
        }
    }

    /**
     * 显示输入对话框
     */
    private void showEditDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        View view = View.inflate(this, R.layout.dialog_code_input_customize, null);
        //设置dialog布局
        builder.setView(view);
        final AlertDialog dialog = builder.create();
        final EditText edit = view.findViewById(R.id.edit_text);

        Button cancelBtn = view.findViewById(R.id.btn_code_cancel);
        if (cancelBtn != null) {
            cancelBtn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    dialog.dismiss();
                }
            });
        }

        Button okBtn = view.findViewById(R.id.btn_code_ok);
        if (okBtn != null) {
            okBtn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    String text = edit.getText().toString().trim();
                    if (TextUtils.isEmpty(text)) {
                        ToastUtils.show(getApplicationContext(), "输入内容不能为空！");
                    } else {
                        ZxingManager.OnScanClickListener callBack = ZxingManager.getInstance().getCallBack();
                        if (callBack != null) {
                            callBack.onResult(text);
                        }
                        dialog.dismiss();
                        finish();
                    }
                }
            });
        }

        dialog.show();
    }

    /**
     * 开闪光灯
     */
    private void openLight() {
        OpenCamera openCamera = CameraManager.getCamera(); //我们先前在CameraManager类中添加的静态方法
        if (openCamera != null) {
            Camera camera = openCamera.getCamera();
            Camera.Parameters params = camera.getParameters();
            params.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
            camera.setParameters(params);
            camera.startPreview();
            isOpen = true;
        }
    }

    /**
     * 关闪光灯
     */
    private void closeLight() {
        OpenCamera openCamera = CameraManager.getCamera(); //我们先前在CameraManager类中添加的静态方法
        if (openCamera != null) {
            Camera camera = openCamera.getCamera();
            Camera.Parameters params = camera.getParameters();
            params.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
            camera.setParameters(params);
            isOpen = false;
        }
    }
}